WILLBROS GROUP INC DEL

CUSIP: 969203108 Class: COMMON STOCK

MASSACHUSETTS FINANCIAL SERVICES CO /MA/'s Holding History (CIK: 0000912938)

Note: Option positions (PUT/CALL) are excluded.

Q1 2015
Shares 76,774 Value ($000) $254,122 Avg Close — Range —
Q4 2014
Shares 82,310 Value ($000) $516,084 Avg Close — Range —
Q3 2014
Shares 86,142 Value ($000) $718 Avg Close — Range —
Q2 2014
Shares 88,515 Value ($000) $1,093 Avg Close — Range —
Q1 2014
Shares 91,830 Value ($000) $1,158,895 Avg Close — Range —
Q4 2013
Shares 98,040 Value ($000) $923,537 Avg Close — Range —
Q3 2013
Shares 105,340 Value ($000) $967,021 Avg Close — Range —
Q2 2013
Shares 110,730 Value ($000) $679,882 Avg Close — Range —